Machine for making clew-thimbles



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Patented Oct. 28, 1890.

(No Model.) 4 Sheets-Sheet 3.

J. T. HAMBAY.

v MACHINEl FOR MAKING GLI-3W THIMBLBS. VNo. 439,350. Patented Oct. 28, 1890.

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J. T. HAMBAY. MACHINE PoR MAKING GLBW THIMBLES.

No.439.s5o. 'Patented o0t.28,189o.

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UNITED STATES PATENT OFFICE.

JAMES T. HAMBAY, OF WILKINSBURG, PENNSYLVANIA.

MACHINE FORHMAKING CLEW-THIMBLES.

SPECIFICATION forming part of Letters Patent No. 439,350, dated October 28, 1890.

Application filed July 16, 1890- Serial No. 358,928.. (No model.)

To all whom it may concern:

Be it known that I, JAMES T. HAMBAY, a citizen of the United States, residing at Wilkinsburg, in the county of Allegheny and State of Pennsylvania,'have invented or discovered certain new and useful Improvements in Machines for Manufacturing Thimbles, of which improvements the following is a speciiication.

The invention described herein relates to certain improvements in mechanism for manufacturing thimbles and other like articles employed as a lining for eyes formed in wire or other rope.

The invention consists in the construction and combination of mechanical devices or elements, all as more fully hereinafter described and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 is a top plan view of the machine constructed in accordance with my invention. Fig. 2 is a front elevation of the same. Fig. 3 is an end elevation. Fig. 4 is a sectional elevation, the plane of section being indicated by the line y y, Fig. 1. Fig. 5 is a plan view on an enlarged scale of the dies operative on the blank. Fig. 6 is a vertical section on the line Fig. 5. Fig. 7 is a view illustrating the manner of severing and notching the blank, and Figs. 8 and 9 are views, of the completed thimble.

In the practice of my invention suitable bearings 1 are formed on the rear side of the bed-plate 2 for the power-shaft 3, and on this shaft are keyed the cams 4, 4, 5, 6, 7, and 8, whereby the several mechanisms for effecting the several steps involved in forming the thimbles are operated.

At a suitable point near the front of the machine I secure one half of the former 9, the other half of said former being attached to a vertically-moving head 10, mounted in a guide 11, formed on a bracket 12, bolted to the bed of the machine, as shown in Figs. 2 and 4. The cross-sectional contour of the former may be approximately heart shape, as shown in Fig. 6, or round, according to the shape of the thimble to be formed, and is provided with a circumferentialrgroove when the parts are in operative position, into which the metal strip is forced, thereby effecting the desired transverse bend thereto. The upper portion of the former is provided with a pin 13, adapted to fit in a corresponding hole in the lower portion, so as to lock the two parts together vduring the bending of the strip. The upper end of the moving head is connected to the outer end of an arm 14, keyed, as shown in Fig. 2, to a rock-shaft 15, which is mounted in suitable bearing formed on the upper ends of standard 16, projecting upward from the bed 1. The rear end of the rock-shaft is provided with an arm 17, having a frictionroller 18 attached thereto and adapted to engage a groove in the cam 7.

A strip of metal dependent as-regards its width upon the size of thimble to be formed is first heated and then fed into one side of the machine until its end abuts against a stop 19 passing behindl the lower portion of the former. Then in the operation of the machine the upper portion of the former descends into operative position, and simultaneously therewith a slide 20, mounted in suitable ways formed on the bed of the machine, is forced forward by the cam 5. A steel block 21, provided with a diamond-shaped opening 22 in its face, is attached to the front end of the slide, and by the forward movement of the latter presses the strip against and over a diamond-shaped punch 23, thereby severing the strip and cutting a V-shaped notch in the rear end of the severed portion and in the front end of the strip. The punch 23 is formedon a bar 24, which passes down through a slot 25 in the bed and has its lower end attached to a plate 26, bolted to the under side of said bed, as shown in Figs. 1, 5, and 6. The stop 19, which is made of a shape corresponding to that of the notch in the strip, so as to prevent injury to the points formed by said notch in feeding the strip into the machine, is formed on the upper end of a bar 27, and is secured in position in the same manner as the punch. In Fig. 6 a double stop is shown adapted for different widths of strip employed, the stop 19 being brought into operative position by reversing the bar 27. In order to prevent any upward movement of the strip in feeding it into the machine, or of the rear end of the blank during the bending operation, a guide- IOO roller 28 is attached to the front end of the slide 20, as shown in Figs. 5 and 6.

After the completion of the severing and notching operation a slide 29, arranged in guides formed on the bed of the machine, is forced forward by its cam 6. On the front end of this slide is attached a die 30, having its operative face constructed to iit part way around the former 9 and to force the strip into the groove formed therein. As stated, the strip is fed in behind the former 9, so that as the die moves forward toward the former the ends of the blank are bent around into approximate parallelism with each other, and the blank by being forced into the groove in the former is bent longitudinally into a U shape. After the preliminary bend thus imparted by the die 30, and while said die still bears against the blank, slides 31, connected to the ends of levers 3.2,pivoted to the frame of the machine are forced inwardly toward the former by means of cams 4 4a operating through the levers 32, which are provided with friction-rollers 33, engaging grooves in said cams, as shown in Fig. 1. On the inner ends of the slides 31 are attached dies 34, constructed to inclose such portion of the former as is not inclosed by the die 30, and are provided with ribs adapted to force the strip into the circumferential groove in the former. As these dies move inwardly they engage the end portions of the blank and compress it around the former and complete the longitudinal bend started by the die 30, as hereinbefore described, thereby completing the thimble. After the completion of the thimble, as described, the dies 30 and 34 are withdrawn, and the upper portion of the former 9 raised, the completed thimble remaining on the lower portion of the former. A loop 35 then passes in above the thimble, drops down over the same, and then moves outwardly, thereby removingthe thimble from the machine. This loop 35 is pivotally connected to the end of an arm 36 of the shaft 37, which is provided at its opposite end with an arm 38. This arm is connected to one end of a push-rod 39, the inner end thereof being provided with a friction-roller held against the cam 8 by a spring 40, attached at one end to the arm 38 and at its opposite end to a stationary part of the machine. The loop is guided into the machine by an eye 42 on the lower end of a bracket 43, secured to the machine. The loop is held against the lower side of the eye 42 by a spring 44, and said guide-eye is so located with reference to the path of movement of the pivotal connection of the loop with the arm 36 that as the outer end of the loop is raised by the inward movement of the arm 36 the inner end of the loop will move down behind the thimble resting on the lower portion of the former 9, as will be clearly understood by reference to Fig. 4.

It will be readily understood that as the thimble approaches a circular shape the notches cut in the ends of the blank should be reduced in depth, the ends of a blank for a circular thimble being cut square, and, further, the device employed for removing the thimble need not be in the form of a loop, but may be made in the form of a finger projecting laterally from a bar, so as to catch behind the completed thimble.

I claim herein as my inventionl. In a machine for manufacturing thimbles, the combination of a former provided with a peripheral groove, a die for bending the blank into a U shape, and dies for completing the bending operation, the dies being constructed to force the blank into the groove in the former, thereby bending the same longitudinally, substantially as set forth.

2. In a machine for manufacturing thimbles, the combination of a separable former, a die for bending the blank into a U shape around the former, and dies for completing' the bending operation, the dies and former being constructed to bend the blank longitudinally, substantially as set forth.

3. In a' machine for manufacturing thimbles, the combination of cutting mechanism4 for severing the blank from a strip of metal and notching the ends of the blank, a separable former, adie for bending the blank into a U shape around the former, dies for completing the bending operation, the former and dies being constructed to bend the blank longitudinally, substantially as set forth.

4. In a machine for manufacturing thimbles, the combination of a separable former, a die for bending a blank into a U shape around the former, dies for completing the bending operation, the former and dies being constructed to bend the blank longitudinally, and a reciprocating loop or finger adapted to engage and pull the completed thimble out of the machine, substantially as set forth.

Invtestimony whereof I have hereunto set my hand.

JAMES T. HAMBAY. Witnesses:

R. H. WHITTLESEY, DARWIN S. WoLcoTT.

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